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(11) | EP 0 817 379 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Apparatus and method for digital data recovery |
| (57) The invention provides for a receiver (10) for recovering digital data from a transmitted
balanced signal where the balanced signal includes a first plurality of pulses, each
pulse having a first pulse width. The receiver includes an input circuit (20), a buffer
circuit (40), and a calibration circuit (60). The input circuit (20) is arranged to
receive the transmitted signal and includes a first differential amplifier for amplifying
a first signal (22), a second differential amplifier (24) for amplifying a second
signal, and a converter (26) for receiving the amplified first signal and amplified
second signal and then generating a third signal. The first and second signals are
included within the transmitted signal. The buffer circuit (40) receives and buffers
the third signal, and outputs a fourth signal including a second plurality of pulses
which have a second plurality of pulse widths. The calibration circuit (60) receives
the fourth signal. In response to the second plurality of pulse widths being unequal
to the first pulse width, the calibration circuit (60) generates a calibration signal.
The calibration signal is received by the buffer circuit (40) as an input. The buffer
circuit (40) utilizes the calibration signal to modify the fourth signal so that each
of the second plurality of pulse widths is approximately equal to the first pulse
width. |